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Finding the Fourth Proportional to 12,651.15, 18,961.34 and 8,954.45

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Solution

The fourth proportional to 12,651.15, 18,961.34 and 8,954.45 is: 13,420.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.15 : 18,961.34 = 8,954.45 : x
  2. Step 2: Convert to fraction form
    12,651.15/18,961.34 = 8,954.45/x
  3. Step 3: Cross multiply
    12,651.15x = 18,961.34 × 8,954.45
  4. Step 4: Simplify right side
    12,651.15x = 169,788,231.38
  5. Step 5: Solve for x
    x = 169,788,231.38/12,651.15
  6. Step 6: Final answer
    x = 13,420.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.